Remove all percentage widths and lay out toolbar/environment with flex
Remove all percentage widths and lay out toolbar/environment with flex

jwang1919/popcode,popcodeorg/popcode,jwang1919/popcode,jwang1919/popcode,outoftime/learnpad,popcodeorg/popcode,outoftime/learnpad,jwang1919/popcode,popcodeorg/popcode,popcodeorg/popcode